[Unit]
Description=Room camera SRT publisher (ensures mic capture unmuted)
After=network-online.target
Wants=network-online.target

[Service]
Type=simple
# Some USB mics only expose a single "Mic" control; don't fail if a control is missing.
ExecStartPre=/usr/bin/sh -c "/usr/bin/amixer -q -c 0 sset 'Mic Capture Switch' cap || /usr/bin/true"
ExecStartPre=/usr/bin/sh -c "/usr/bin/amixer -q -c 0 sset 'Mic Capture Volume' 100% || /usr/bin/amixer -q -c 0 sset 'Mic' 100% cap || /usr/bin/true"
ExecStart=/usr/bin/ffmpeg \
  -fflags nobuffer -thread_queue_size 256 -f v4l2 -input_format h264 -i /dev/video2 \
  -fflags nobuffer -thread_queue_size 256 -f alsa -ar 16000 -ac 2 -i hw:0,0 \
  -map 0:v:0 -map 1:a:0 \
  -c:v libx264 -preset ultrafast -tune zerolatency -b:v 600k -maxrate 700k -bufsize 1400k \
  -c:a libopus -b:a 64k -ar 16000 -ac 1 \
  -flush_packets 1 -f mpegts \
  srt://192.168.0.86:9000?streamid=#!::r=room/carpet,m=publish&latency=10&mode=caller&transtype=live&pkt_size=1316
Restart=always
RestartSec=2
User=root
Group=root

[Install]
WantedBy=multi-user.target